I've been eating at a noodle shop in Philly's chinatown lately (for a write-up, see Pennsylvania board), mostly because I really like their noodle dishes. But I would really like to be able to get greens there to go with my noodles--chinese mustard, snow pea tips, whatever--but the problem is they don't have them on the menu. I know they'll make them because I have seen others eating them there, and because last night I got some really tasty sauteed bok choy that wasn't on the menu. Here's the crux of my problem: they speak virtually no english at this noodle house, and I speak no chinese (none of any dialect). I got the bok choy, because that's the one chinese green I know the chinese name of.
my question, then: what are some names of other chinese greens that the restauranteers might understand? I know they don't know the english names because I tried that. I don't know what part of China they're from, nor do I know whether that's an issue in this case.